Electrical Hub

Introduction  The term Transmission Lines broadly refers to overhead transmission lines and underground cables. The key function of a transmission line is to transfer bulk power between generation sources and load centres. ElectraNet owns, manages and operates transmission lines at 275kV, 132kV and 66kV. Transmission Lines are made up of various components, namely poles, lattice structures, conductors, cables, insulators, foundations and earthing systems. These components are described in more detail in this document.   A transmission line is used for the transmission of electrical power from generating substation to the various distribution units. It transmits the wave of voltage and current from one end to another. The transmission line is made up of a conductor having a uniform cross-section along the line. Air act as an insulating or dielectric medium between the conductors. Purpose  The purpose of this document is to provide a high-level summary of the various compo...

  House electrical wiring is a process of connecting different accessories for the distribution of electrical energy from the supplier to various appliances and equipment at home like television, lamps, air conditioners, etc. Let us look at the different types of electrical wiring that are used in domestic properties. 5 Different Types of Electrical House Wiring Systems Cleat Wiring This wiring comprises of PVC insulated wires or ordinary VIR that are braided and compounded. They are held on walls and ceilings using porcelain cleats with groves, wood or plastic. It is a temporary wiring system, therefore making it unsuitable for domestic premises. Moreover, cleat wiring system is rarely being used these days. Casing and Capping Wiring It was quite popular in the past but it is considered obsolete these days due to the popularity of the conduit and sheathed wiring system. The cables used in this electric wiring were PVC, VIR or any other approved insulated cables. The cables were ca...

General Construction of the underground cable is shown in the below figure. there is the main part of Under the ground cable is, 1) CORE 2) INSULATION 3) METALIC SHEATH 4) BEDDING 5) ARMOURING 6) SERVING   Now we will discuss all the part of underground cable in step by step. 1) CORE The function of the core is to carry current. its made up of copper or aluminium and stranded core is used. there is flexibility is increase due to stranding. a core is placed at the centre of the cable. following types of core used in an underground cable. "1 core, 2 core, 3core, 3.5 core, 4 core" 2) INSULATION Insulation is placed above the core & it is necessary between the conductor and earth in single-core the cable also between conductors and earth in multi-core cable. there are different types of insulations are used like paper, varnished cambric, rubber, vulcanised bitumen, oil-impregnated paper, PVC, metalized paper etc used for insulation in differen...

Before to start of polyphase induction motor, we will learn introduction about three-phase induction motor. Three-phase induction motor is the most widely used ac motor in an industrial and commercial application. The three-phase induction motor can be considered among the most reliable electrical machines. These motors find their application in the most differential sector such as food, chemical textiles, metallurgical and paper industries.  Thee motor is widely used for most of the industrial application such as centrifugal pump, conveyers, compressor, crusher,s, punch press etc. In fact, three-phase induction motors find their application everywhere from a small workshop to large industry. Following are the main advantages of three-phase induction motors: Simple and rugged construction Required little maintenance Good operating or performance characteristics such as power factor and high efficiency Don’t have commutator so, low maintenance required. Low cost Very efficient, rob...